Heel-attaching machine



Aug. 14, 1934.

HEEL ATTACHING MACHINE Filed March 17. 1932 L ,0 72| 64 hj@ w 62 f. www

Patented Aug. 14, 1934 STATS HEEL-ATTACHING MACHINE Fred lL. MacKenzie, Beverly, Mass., assignor to United Shoe Machinery Corporation, Paterson, N. il., a corporation of New Jersey Application March 17, 1932, Serial No. 599,481

12 Claims.

This invention relates to heeling machines, being particularly concerned with the mechanism by which pressure is applied to hold in place upon the heel-seat of a jacked shoe a heel which is to be attached by nails driven from inside the shoe.

In machines of the character above indicated, there is customarily nrst applied by the operator a preliminary or measuring pressure, by which a retaining head or abutment is brought into rm Contact with a heel positioned upon a jacked shoe. Then the power-operation of the machine is started, and the heel is subjected to a nnal clamping pressure, intended to hold the heel and shoe against displacement from the jack-top under the influence of the nails being driven through said jack-top and through the heel-seat into the heel. It is found diiiicult to apply this nnal pressure with sufficient force and at the proper time to prevent separation of the work from the jack. if kthis movement is allowed to occur, the heads of the nails will not be sufficiently sunk in the insole, the crease not made as tight as is desirable, and there is a tendency for the heel to be tilted forward upon the heel-seat, which causes the nails to be misdirected, they emerging through the periphery of the heel at the rear 'or splitting it. It is an object of my invention to subject the heels in this class of work to ample pressure to resist the displacing force oi the nails, and to a controllable degree for heels and shoes of diiierent character, and to obtain this pressure in the correct relation to the time of actuation or" the naildrivers. I achieve this end by combining with a jack, its co-operating Work-clamping pressurehead and a driving shaft of thD machine, a cam rotatable by the driving shaft and having at its periphery portions of different curvature, together with a link or connecting member contacting with opposite sides oi the cam, as through a spaced pair or pairs ci opposite plates, and joined to the head. A thus acting upon the head may be caused to exert a direct force with- 45 out interposed elements, to create pres ure upon the work and to remove such pressure without the employment of springs or the like. The cam may be of such contour, regardless of the manner inv which its eiect is transmitted, as to give the chosen timing or" the pressure with reference to the nail-insertion. I prefer to provide a cam with opposite concentric portions of different diarneters and inclined intermediate portions. The difference in diameter of the concentric portions Will give the desired clamping travel of the (Cl. ll-32) head, and the intermediate inclination, which applies and removes the pressure, may be of relatiVely small circumferential extent, so the pressure-change occurs quickly as compared with the periods of rest of the head. During these periods, the nail-drivers make their advancing and retreating strokes, and a clutch device, which permits the separate application of preliminary and final pressure, may be locked and unlocked. Since heels and heel-seats having different characteristics call for the application of varying pressures, I may provide for forming the camsurface of my invention upon an eccentric, this being surrounded by a strap or a portion of a link which is joined to the pressure-head. By altering the throw of the eccentricthis is added to or subtracted from the effect of the cam, and the pressure imposed by the 'head is correspondingly changed.

One of the several embodiments of which my invention is capable appears in the accompanying drawing. Here,

Fig. 1 shows in broken side elevation a portion of a heel-attaching machine to which my improved pressure mechanism is applied; and

Fig. 2 is a front elevation of said mechanism.

The general heeler-organization herein illustrated is similar to that of Letters Patent of the United States No. 1,545,575, Standish, July 14, 1925. Upon a frame 10 is carried a shoe-support or jack 12, in which is a plunger 14 carrying naildrivers 15 and reciprooated through a connectingrod 16 from a crank-pin 18 upon the forward eX- tremity of a power-shaft 20 journaled horizontally near the bottom of the frame. A shoe S to be heeled may be placed heel-seat up upon the jack. Guided in vertical ways in the frame is a pressure-head 22 provided with Contact members 24 and 26 for engagement with the treadand rear surfaces, respectively, of a heel H positioned upon the heel-seat of the jackedshoe S. This pressure device may have means, as a spring, for holding it normally raised from the work, and treadle connections by which the members are lowered into preliminary contact ,with the heel. But, as this invention deals wholly with the application of the final pressure under the power of the machine to clamp the heel so that it will resist the upward displacing force oi the attaching nails as they are driven through the heel-seat into the heel, this elevating and measuring means is not herein illustrated. t

For the creation, of the final pressure by, the head 22, it hasdepending from it a set `of clutchplates 28, spaced from each other; and intermachine may be positively and quickly moved into and out of Work-clamping relation at such times that its full resistance is offered to driving force applied to the heel-attaching nails. Moreover, the extent of this movement may be varied to suit particular operating conditions withodt disturbing the established time-relation.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

l. In a heel-attaching machine, a jack, a pressure-head movable to clamp the work upon the jack, a driving shaft, a cam rotatable by the shaft and having at its periphery portions of different curvature, and a connecting member contacting with opposite sides of the differently curved periphery of the cam and being joined to the head.

2. In a heel-attaching machine, a jack, a pressure-head movable to clamp the work upon the jack, a driving shaft, a cam rotatable by the shaft and having upon its peripheral surface opposite concentric portions of different diam eters and inclined portions between the concentric portions, and a connecting member movable by such peripheral surface and joined to the head.

3. In a heelattaching machine, a jack, a pressure-head movable to clamp the work upon the jack, a driving shaft, a cam rotatable by the shaft, and a connecting member contacting with opposite sides of the carn and being joined to the head, the cam having upon its surface engaged by the connecting member opposite concentric portions of different diameters and inclined portions between the concentric portions.

4. In a heel-attaching machine, a jack, a pressure-head movable to clamp the work upon the jack, a driving shaft, a cam rotatable by the shaft and having upon its peripheral surface opposite concentric portions of different diameters and inclined portions between the concentric portions, the difference in diameter of the concentric portions corresponding to the clamping travel of the head, and a connecting member movable by such peripheral surface and joined to the head.

5. In a heel-attaching machine, a jack, a pressure-head movable to clamp the work upon the jack, a driving shaft, a cam rotatable by the shaft and having upon its peripheral surface opposit-e concentric portions of different diameters and each of considerable circumferential extent and inclined portions of relatively small circu l-- ferential extent between the concentric portions, and a connecting member movable by such peripheral surface and joined to the head.

6. In a heel-attaching machine, a jack, a pressure-head movable to clamp the Work upon the jack, a driving shaft, a cam rotatable by the shaft and having upon its peripheral surface opposite concentric portions of different diameters and inclined portions between the concentric portions, a clutch interposed between the connecting member and head, and means for operating the clutch while the concentric portions of the cam are acting upon the connecting member.

7. In a heel-attaching machine, a jack, a pressure-head movable to clamp the Work upon the jack, a driving shaft, a cam rotatable by the shaft and having differently curved peripheral portions, and a link connected to the head and having a portion surrounding the cam, said portion contacting with the periphery thereof at certain points and being separated therefrom at other points.

8. In a heel-attaching machine, a jack, a pressure-head movable to clamp the work upon the jack, a driving shaft, a cam rotatable by the shaft and having differently curved peripheral portions, a link connected to the head and having a portion surrounding the cam, and opposite plates carried by the surrounding portion for contact with the cam and being substantially parallel to each other.

9. In aY heel-attaching machine, a jack, a pressure-head movable to clamp the Work upon the jack, a driving shaft, a cam rotatable by the shaft, a link connected to the head and having a portion surrounding the cam. and pairs of plates spaced from one another about the surrounding portion for the contact with the cani and corresponding substantially to the sides of a square.

i0. In a heel-attaching machine, a jack, a pressure-head movable to clamp the Work upon the jack, a driving shaft, an eccentric rotatable by the shaft and provided with cam-projections, and a link having a portion surrounding the eccentric and being joined to the head.

ll. In a heel-attaching machine, a jack, a pressure-head movable to clamp the work upon the jack, a driving shaft, an eccentric rotatable the shaft and provided with cam-projections, means arranged to vary the throw of the eccentric, and a link having a portion surrounding the eccentric and being joined to the head.

I2. In a heel-attaching machine, a jack, a pressure-head movable to clamp the Work upon the jack, a driving shaft, a member having an inclined peripheral surface and being rotatable by the shaft, an eccentric movable upon such inclined surface longitudinally of the shaft and provided with cam-projections, means carried by the shaft and arranged to move the eccentric, and a link having a portion surrounding the eccentric and being joined to the head.

FRED L. MACKENZIE. 

